Are northern leopard frogs available as pets?

[somuchpaint]

I recently added 3 Southern Leopard Frogs to my family and I absolutely love them. Plus Southern Leopard Frogs don't get as big as Northern Leopard Frogs so that makes housing them a bit easier.

I would be interested in any information you could give me on caring for Southern Leopard Frogs. I have two tadpoles (with hind legs) that I am pretty sure are Southern Leopards, and I am trying to set up a proper adult habitat for them before they get their front legs.

I have an empty 40 gallon breeder, and was hoping to make some sort of half-land half-water set-up. Is this ridiculously large for two Southern Leopard Frogs?